Black Bean Butter SauceIn a blender, mix black beans, chile powder, cumin, granulated garlic, onion powder, salt, and cayenne. Blend until smooth then transfer to small sauce pan. Heat sauce until it starts to bubble. Cut up stick of butter into 4 pieces. While stirring with a whisk add 1 piece of butter at a time, letting them melt before adding the next piece. Make sure to continuously stir so butter does not separate. Lower heat to low and let simmer stirring occasionally while you prepare slaw.